However, there is no obvious barrier within monadology to the creation of a black-box simulation of consciousness whose interior mechanism is made up of many simple monads rather than a single complex conscious monad, and which is therefore not conscious itself.

If the conscious monad's internal dynamics are uncomputable (even if its behavior is computable), and such a simulation must therefore have a radically different internal structure, perhaps not. But if such a simulation can be made which is structurally similar enough to the conscious monad, then it z-talks about consciousness for the same reason (at the appropriate level of abstraction) as the conscious monad, and the standard anti-zombie arguments return.